public class ConcreteBuilder extends Builder{
    String PartA;
    String PartB;
    @Override
    public void buildPartA(String PartA){
        this.PartA = PartA;
    }
    @Override
    public void buildPartB(String PartB){
        this.PartB = PartB;
    }
    @Override
    public Product buildProduct(){
        Product product = new Product();
        product.setPartA(PartA);
        product.setPartB(PartB);
        return product;
    }
}
